讀期刊，小確幸

今日偶爾看到某期刊文章中有這麼一句：

Several proofs of this fact may be found in [18] along with the interesting historical remarks such as that Schrödinger could not find a proof that these eigenvalues are correct.

嘴角馬上牽起來，原因是兩月前有人問了完全相同的問題，但我花了不到廿分鐘就用最基礎的手段解決了。能勝過量子力學大師 Schrödinger （即是「薛丁諤的貓」那位薛丁諤），難免沾沾自喜。

自吹自擂就到此為止了。有關的問題其實並不太難，只是有時聰明人束手無策，而平凡人靈機一觸，答案卻自己跑出來。學術也是講運氣的。